Synopsis...An Atlantic Ridge Of High Pressure Will Extend Across Cuba Tonight. A Cold Front Will Progress Southward Down The Florida Peninsula Tuesday. This Cold Front Will Pass Through The Florida Keys Tuesday Night. An Area Of High Pressure Over The Southeastern United States Will Build Southeastward Down The Florida Peninsula Wednesday Through Friday. The Approximate Shoreward Edge Of The Gulf Stream Current, As Of March 17th, 2018. 52 Nm South Of Dry Tortugas Light, On Loggerhead Key. 11 Nm South Of Cosgrove Shoal Light, Off The Marquesas Keys. 11 Nm South Of Sand Key Light, Off Key West. 11 Nm South Of Looe Key, Off Big Pine Key. 8 Nm South Of Sombrero Key Light, Off Marathon. 8 Nm Southeast Of Alligator Reef Light, Off Islamorada. 4 Nm Southeast Of Molasses Reef Light, Off Key Largo. 5 Nm East Of Carysfort Reef Light, Off Ocean Reef. Gulf Stream Information Courtesy Of The Naval Oceanographic Office.